Ruijie Networks RG-S2910C-XS-P Series Hardware Installation And Reference Manual page 19

Figure 1-8 Flow Scheme of Heat Dissipation
LEDs
LED
System status LED
Panel Identification
Status
State Meaning
Off The switch is not receiving power.
Initialization in progress.
Blinking green
Continuous blinking indicates errors.
Solid green The switch is operational.
Temperature warning.
Solid yellow
Check the working environment of the switch
immediately.